Drying-chamber.



PATENTED JUNE 12, 1906.

A. SGHRUDBR. DRYING CHAMBER. APPLICATION FILED AUG. 30, 1905.

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A. SGHRUDER. DRYING CHAMBER.

APPLICATION FILED AUG. 30, 1905.

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ADOLPH SCHRCDER, 'OF 'B'ERTJI'N, GERMANY, ASSIGNOR TO ALFRED LKRAUSE, OFBERLIN, GERMANY.

DRYING-CHAMBER.

.Specificationof Letters Patent.

-Applicati011 filed August 30, 1905.

.PatentedJune112,,1906.

Serial No. 277,278.

side walls and door, passes around the objects to be dried, and thenescapes through the outlet-flue or chimney of the chamber.

The invention is illustrated in the accompanying drawings, in whichFigure I is a vertical-section of the apparatus. Fig. I is an elevationof the door, partly in section. Fig. II is a vertical section taken-atright angles to Fig. I. Fig. III is a horizontal-section through 'Fig.I. Fig. IV is a plan of one of the trays. Fig. IV is a section throughFig. IV. Fig. V is -a plan viewillustrating the manner of disposal ofthe gas-pipes. 'Fig. VI is'aplan of the heat- Fig. VI is afrontelevation thereof. Fig. 'VI -is a side elevationthereof. Fig. VIIis a detailsectional view drawn to'an enlarged scale and showing themanner in which the gas-pipes are secured below the heating-box.

The drying-ohamber consists of the lower portion 5, in-which the hot airfor drying is produced, and the main portion or actual drying-chamber,which is surrounded by -hollowside walls 1 2 3'and a hollowdoor 4.

Both the hollow side walls land 2'and the hollow .door 4 are provided onthe inner and outer walls with sliding dampers 24 25 26 27 33 34, havinga number of perforations, so that by opening the inside dampers only thehot air employed for drying rushes directly into the interior chamber oroven, while by opening the outside dampers located opposlte these insideones tempered air streams into the oven. By the provision of suchdampers at various heights it is thus possible to introduce hot ortempered air to each zone of the drying-chamber, as desired.

The articles to be dried are placed upon the drying-trays 37, Fig. IV,and after the chamber-door has been opened are pushed onto ledges 35.These latter are of angleiron of U shape and their limbs, Fig. III, aresecured'to the face of the side walls of the drying-chamber, while thethird portion or,

base of the -U stands at a certain distance from the back wall of thechamber-and serves as a stop to prevent the trays from being pushed intoo far. Inthis manner even large objects can'be placed in-thedrying-ohamber. Owing to the distance between the ledgesand the backwall of the chamber, the vapors-arising during the drying process canpass off unobstructedly.

The hot-air generating apparatusb, Figs. I and VI, consists of twopartsa bottom compartment 6 and an upper com artment 7. The formerliesdi-rectly abovet e gas-pipes .20 21 2'2 23 and is provided on theright and left and in front with sliding dampers 4546 1-9, having each anumber of perforations through which cold air canflow in. By a suitablearrangement of'baffle-pla'tes, Fig. I, in the said bottom part the airis always brought to the hottest parts ofthe base .and then flowsthrough the apertures 15 1'6 '17, Fig. VI, into thedistributing-compartment 7, where it is compelled by ribs 89 10.11 toflow, on the one hand, to the'hollowside-wa-lls 1 and "2 through theapertures 12 14 and, on the other hand, to the hollow double doors-4,Figs. IIa-nd VI, through the apertures'13.

The place .47 at which the *hotairrushes into the hollow double door 4,is provided with a sliding damper 48, presenting a .number ofperforations, whereby when the door is opened by-operati-ng this-damperhot air may be prevented from escaping.

The method of arranging the gas-pipesZO to 23 below the heating-chamber5 is'illustratedin detail in' Fig. VII. The pipes 20 to 23, which arefurnished with two rowsof gasoutlet holes, are ad-justably supported bysorew-h0lders 38 andlie directly below the ridges or elevations 40 i 40,presented by the bottom of the heating-chamber 5. There is thus a space43 left above the pipe, through which (since the gas-pipes are somewhatinclined in position) the vapors and heatinggases arising in combustionwill readily flow off toward the hollow back wall 3. By this means,first, the cold air at 41 42 can readily flow along the entire length ofthe gas-pipe, and, second, the rearwardly-lying gas-jets are preventedfrom burning badly or failing to burn at all.

senting hot-air inlets and the outer walls ter.

As Fig. V shows, the gas-pipes are so arranged that those lying towardthe center are shorter than the outer ones. The line 39 indicates theposition of the front edge of the drying-chamber.

In the center of the hollow double door 4 there is a horizontalpartition 32, from which two vertical partitions 3O 31 run downwardly atthe right and left, so that the air leaving the heatingbox 5 is causedto flow directly to the top part of the door when the lower dampers areclosed.

In the'actual heating-chamber between the ribs coarse metallic turnings,borings, or like shavings may be introduced for the purpose ofincreasing the surface. Such turnings or the like may also be introducedinto the hollow side walls and double door to serve as fil- 44 is thechimney or outlet flue for spent air and vapors and waste gases.

Having thus described my invention, I

. claim as new and desire to secure by Letters Patent- 1. Adryingapparatus, comprising a chamber having hollow walls, the inner wallsprecold-air inlets at parts coincident with the hot-air inlets,perforated slides controlling such air-inlets, means at the bottom ofthe apparatus for heating the air which passes between thechamber-walls, and a spent-air and waste-gas outlet, substantially asdescribed.

2. Adrying apparatus, comprising a chamber having a hollow-walled bodyand door, the inner walls of which body and door present hot-air inletsand the outer walls coldair inlets at parts coincident with the hot-airinlets, perforated slides controlling such in lets, means at the bottomof the apparatus for heating the air, which passes between thechamber-walls, and a spent-air and waste-gas outlet, substantially asdescribed.

3. Adrying apparatus, comprising a chamher having a hollow-walled bodyand door, the inner walls of which body and door present hot-air inletsand the outer walls coldair inlets at parts coincident with the hot-airinlets, perforated slides controlling such inlets, a horizontalperforated partition dividing the space between the doorwalls and twovertical partitions exte'ndingdown'ward from the horizontal partition,means at the bottom of the apparatus for heating the air which passesbetween the chamber-walls, and a spent-air and Waste-gas outlet, substantially as described.

4. Adrying apparatus, comprising a chamber having a hollow-walled bodyand door, the inner walls of which body and door present hot-air inletsand the outer walls coldair inlets at parts coincident with the hot-airinlets, perforated slides controlling such inlets, superposed horizontalU-shaped frames secured to the inner side walls of the chamber, the baseof the U standing free of the back wall, and trays adapted to lie on theframes, means at the bottom of the apparatus for heating the air whichpasses between the chamber-walls, and a spent-air and waste-gas outlet,substantially as described.

5. Adrying apparatus, comprising a chamber having a hollow-walled bodyand door, the inner walls of which body and door present hot-air inletsand the outer walls cold-air inlets at parts coincident with the hot-airin-' lets; perforated slides controlling such inlets, a heating-box atthe bottom of the apparatus communicating with the spaces between thesaid body and door walls and presenting an upperdistributing-compartment and a lower air-heating compartmentcommunicating therewith and having cold-air inlets and an inclinedridged base; and gaspipes presenting laterally-directed jet-holes,located below the ridges in such a manner, that a space is left abovethejets; and a spentair and waste-gas outlet, substantially asdescribed.

6. A drying apparatus, comprising a chamber having hollow walls, theinner walls presenting hot-air inlets and the outer walls cold-airinlets at parts coincident with the hot-air inlets, perforated slidescontrolling such air-inlets, means at the bottom of the apparatus forheating the air which passes between the chamber-walls, metallicshavings packed in the space between the walls and a spent-air andwaste-gas outlet, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ADOLPI-I SCHRODER.

WVitnesses WOLDEMAR HAUPT, HENRY HASPER.

